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Finding the Fourth Proportional to 28,704.87, 43,051.15 and 8,980.86

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Solution

The fourth proportional to 28,704.87, 43,051.15 and 8,980.86 is: 13,469.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,704.87 : 43,051.15 = 8,980.86 : x
  2. Step 2: Convert to fraction form
    28,704.87/43,051.15 = 8,980.86/x
  3. Step 3: Cross multiply
    28,704.87x = 43,051.15 × 8,980.86
  4. Step 4: Simplify right side
    28,704.87x = 386,636,306.08
  5. Step 5: Solve for x
    x = 386,636,306.08/28,704.87
  6. Step 6: Final answer
    x = 13,469.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.